Abstract
Ultimate behavior of Lead Rubber Bearing (LRB) and Natural Rubber Bearing (RB) was investigated by bi-directional loading tests. LRB specimens provided by 7 types small models, which have square and circular shape, varied lead plug diameters, lead plug disposition and rubber layers. RB specimen was provided by square shape without lead plug. In this study it was cleared that brake-shear-strain was not influenced by the cross-section shape, lead plug diameters, and lead plug dispositions. Moreover LRB wasn’t spoiled for brake-shear-strain under the bi-directional loading. It was also found that the brake-shear-strain of LRB was the same as that of RB.
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